The Siemens 3LD2103-0TK51 Switch Disconnector is a premium industrial switching solution designed to deliver safe electrical isolation, reliable circuit control, and long-term operational performance. As part of the highly trusted Siemens SENTRON 3LD2 Series, this switch disconnector is engineered for industrial control panels, power distribution systems, motor control centers, OEM machinery, and automation applications where safety and reliability are essential. The 3LD2103-0TK51 combines robust Siemens engineering with a compact front-mounted design, making it a dependable choice for modern industrial installations.
The Siemens 3LD2103-0TK51 is a 3-pole main switch disconnector with a rated current of 25A and an operating power rating of 9.5 kW at AC-23A, 400V. Designed as a main switch, it provides secure isolation of electrical circuits while ensuring reliable switching performance for industrial applications. The switch features a front-mounted rotary operating mechanism with a black handle and four-hole mounting arrangement for easy installation and operation.
One of the major advantages of the 3LD2103-0TK51 Switch Disconnector is its versatility. Siemens specifies that this model is suitable for use as a:
This flexibility makes the switch ideal for industrial facilities where safe isolation and dependable control are required across multiple applications.
The 3LD2103-0TK51 incorporates a durable short rotary knob operating mechanism with clear ON (1) and OFF (0) position indication. The ergonomic black handle allows operators to quickly identify switch status and perform switching operations with confidence. Its front-mounted design simplifies panel integration while maintaining easy access for maintenance and operation.
A key benefit of the Siemens 3LD2103-0TK51 is its high level of environmental protection. The switch offers IP65 protection from the front, providing excellent resistance against dust ingress and water exposure. It also meets NEMA 1, 3R, 4X, and 12 requirements, making it suitable for demanding industrial environments such as manufacturing facilities, process plants, utility installations, and infrastructure projects.
The switch is engineered for long-term durability with a mechanical service life of up to 100,000 operating cycles and electrical endurance of approximately 6,000 cycles at AC-23A, 690V. This exceptional durability helps reduce maintenance costs while ensuring reliable operation throughout the product lifecycle.
Safety remains a primary focus of the SENTRON 3LD2 range. The 3LD2103-0TK51 can be locked in the OFF position and supports up to three padlocks for lockout/tagout (LOTO) procedures. This feature helps maintenance personnel safely isolate equipment during servicing and reduces the risk of accidental energization.
The switch is designed for operation at voltages up to 690V AC and features a rated insulation voltage of 690V along with a surge voltage resistance of 6kV. Additionally, it offers a conditional short-circuit current rating of 50kA when protected by a suitable gG fuse, enhancing overall system protection and reliability.
At SB Smart (SBSmart.in), we supply genuine Siemens electrical and industrial automation products that meet the highest standards of quality, performance, and reliability. The Siemens 3LD2103-0TK51 Switch Disconnector delivers authentic Siemens engineering and dependable performance for critical industrial applications.
Whether you are building a new electrical panel, upgrading a power distribution system, or implementing a reliable isolation solution, the Siemens 3LD2103-0TK51 offers the safety, durability, and operational confidence expected from Siemens SENTRON products.
| Specification | Details |
|---|---|
| Product Name | Main Control Switch / Switch Disconnector |
| Part Number | 3LD2103-0TK51 |
| SKU | 3LD2103-0TK51 |
| Brand | Siemens |
| Product Family | SENTRON 3LD2 |
| Product Type | Switch Disconnector |
| Design | Main Switch |
| Number of Poles | 3 Pole |
| Rated Current (Iu) | 25 A |
| Rated Operational Voltage (Ue) | 690 V AC |
| Insulation Voltage (Ui) | 690 V |
| Operating Power AC-23A at 400V | 9.5 kW |
| Operating Power AC-23A at 690V | 10 kW |
| Operating Power AC-3 at 400V | 8 kW |
| Operating Power AC-3 at 690V | 7.5 kW |
| Operating Mechanism | Short Rotary Knob |
| Handle Color | Black |
| Mounting Type | Front Mounted |
| Handle Mounting | 4-Hole Mounting |
| Protection Rating | IP65 |
| NEMA Rating | 1, 3R, 4X, 12 |
| Mechanical Life | 100,000 Operations |
| Electrical Endurance | 6,000 Operations |
| Surge Voltage Resistance | 6 kV |
| Lockable in OFF Position | Yes |
| Maximum Padlocks | 3 |
| Connection Type | Box Terminal |
| Operating Temperature | -25°C to +55°C |
| Conditional Short Circuit Rating | 50 kA (with gG Fuse) |
| Application | Main Switch, Safety Switch & Maintenance Isolation |
| Standards Compliance | IEC 60947-3 |
| Manufacturer | Siemens |
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